Dipper-tooth.



E. S. BLACK.

DIPPER TOOTH.

APPLIOATION FILED mom-12, 1913.

1, 1 07,253. Patented Aug. 18, 1914,

Inventor:

b g 4%% y Atty 113iMira-zen. s; BLACK, ,or -cnxcneo, itninors,.;assrenon 'ro v-nnsan. tem amnnrcan J mnemsn-srnnn comra'mn'or AUGUSTA, MAINE, A conronarxononmamn.

ap lic tion'fil d'n vembe' 12, 193. 'SefialNorSOOABt.

To dll'whomit-m ay concern: 1

eeth, of which the following is a sp'ecihca 'tion. f f Myinvention relates to teeth for dippers- "1.11 n

lair-machines, and particularly tdthat type "for excavating, dredging, digging, a-ndsimi- .of dipperteth in which a shank; or "base portion designed tobe permanently secured H to the'body of the dipper is employed and v to the 'freeouter endof which 'shanka separate detachable point is secured, sothat when the point has been worn away in use to such an extentas 'to 'be no-longer serviceable, it may be. removed from the shank or base and replaced] by another, the shank being used indefinitely or. at least being capable'of use while' several points are worn out in succession.

My invention comprehends the detachable point consideredby itself. and apart from the supporting shank, the,- shank or base likewise considered, and the combination of the base and point which together form adipper tooth; and the object thereof is to provide a shank or base, and a point, which will be simpler in form and easier to cast than has heretofore been the case, the point being commonly made from cast manganese steel and the base from that material or from cast carbon steel.

A further object of my invention is to provide a dipper tooth in which the point will be held against lateral motion more securely than has heretofore been the case, and by means of a lug and recess arrangement which may be more easily provided as the base and point are cast than the means which have heretofore been employed for alike ur ose. With the above and other objects of invention in view, .my invention consists in the improved dipper tooth, point and supporting shank or base therefor illustrated in the accompanying drawing and heremafter described and claimed, and in such variations .and modifications thereof as will be obvious to those skilled in the art to which myinvention relates. In the drawing wherein the preferred g p I form of "m invention isillust-ratedifFigure Be it known that I, EnwArnS. B ACK, a i

' citizen ofthe iUnitedstates'and'a resident of Chicago, inth'ecount'y of 'Cook and State. of Illinois, have made and. invented certain znew and Improvements 'in Dipper:

1 illustrates .my improved fdipper I tooth in 'sideelevamon; Fig. 2 is a view showirigfthe same as seen from a position ;abo'i"" Fig.f rFlg. 3 1s a vlew showing ,3; sect on; taken upon a. longitudinally extending PlPLIlS III-f dicated by the line 3-3, Fig. 2"; 'l i'g'i4 is a view. showing a section takenupon a trans verse plane indicated by'theline 4,45 Fig. 1; Fig. 5 is a View showing a section taken upon a transverse plane indicatedby the line 5, '5, Fig. l';-Fig. 6 isa fragmentary view showing. a section 'taken iipon a transverse "plane indicated by the line 6, 6, F ig.2; and Fig. 'j' is a. View showing a section taken upon '-.a transverse "Referr ng to the slaw-111g, I t e referents numeral 8"deSignatesthe' supporting ba e or B an indi at bil h l s 7 7?.

shank of my improved dipper toothfthe same. being designed to' be secured to? the front port-ionof a'dipper body not shown and having a recess 9 adjacent its outer or free end, which recess fits over the edge of the lip of the dipper, as will be understood. The shank or base is commonly secured to the inner surface of the dipper body with the jaw 10 thereof extending a short distance along the outside of the body and toward the bottom thereof, although these features of construction and arrangement arein 'no way involved in the invention disclosedin this application. a

The free outer end of the shank or base 8 is tapered as shown at 11 in order to provide a tooth seat for receivingthe detachable point 12 of the tooth, and said tapered portion is provided with a projecting lug 13 at its extremity, which lug .is narrower than the projecting portion, as shown' indottedlines, Fig. 2, and is preferably circular in cross-section as shown in Fig. 7. Recessesl l, 15 are also preferably provlded 1n the base,

as will hereinafter appear.

The detachable point 12 of my improved into which recesses lugs upon the detachable point extend, when the point is in place,

in any suitable way as-by means of a bolt extending through registering holes 18 and 19 provided adjacent the freeends of the arms aforesaid and in the shank or base.

llhe said point is also provided with a recess- 20 located adjacent the inner ends of the arms 16, 17, and into which recess the projecting lug 13 of the point enters when the parts are assembled. The outer or free ends of the said arms are provided with lugs 21, 22which enter the recesses 14, 15 of the base to thereby prevent lateral movement of the free ends of the arms and prevent shearing of the securing bolt extending through the' holes 19 when the tooth is in use as will be understood.

In view of the premises it will be apprev ciated that lateral or sidewise motion of the free end of the detachable point 12 when the tooth is in use will be prevented by the lug 13 and side 'walls of the recess 20. This lug and recess arrangement may bemore'easily formed as the base and shankare cast, than the Web' and bifurcated shank commonly 1' provided for preventing lateral movement manufactured; while at the "same time provision is made for preventing 'sidewise of. the point, whereby a simpler -tooth is proeured and one which may be more easily movement of the point.

Having thus described and explained my invention, 1 claim; and desire .to "secure-by Letters Patent: 4 a

A dipper tooth comprising a shank having a free outer end provided with oppositely disposed faces and an outwardly extending lug with a circular cross-section, said shank being further-provided with a centrally disposed recess in one of its faces and with a pair of lugs extending laterally faces of said shank, said point being also provided with a recess of circularcross'section for 'receivmg sald outwardly-extending lug of said shank, one of sad arms carried oppositely "disposed recesses for receiving said pair of lugs carried by said shank; f v Signed at Chicago, in the county ofC'oo k' and State of Illinois, this 2 7thjday of Octo her, A. D 1913. EDWARDS. BLACK]- Witnesses: I I

'EUGENEC. BAUER, EARI'. A; Leanne.

by said pointhaving a lug'for fittin'ginto said centrally disposed recess in said shank,

the other'armof said point having'a pairjof I 

